Mendeley - Easily organize your papers, read & annotate your PDFs, collaborate in private or open groups, and securely access your research from everywhere.
Mayan EDMS - Document management without the headaches.
Zotero - Zotero is a free, easy-to-use tool to help you collect, organize, cite, and share research.
SeedDMS - SeedDMS is an open source document management system based on PHP and MySQL.
PDF Stacks - PDF Stacks software program helps you organize and manage PDF files, papers and documents. Easily search and read your PDF documents on a PC and MAC
MS SharePoint - Share, organize, and discover information with Microsoft SharePoint. Learn about SharePoint Online, OneDrive for Business, and Apps for SharePoint